Why air bags? To level a load that is too heavy on the hitch? Because the tow vehicle is towing too heavy for its rating? To make the road surfaces easier on the back side? Help us understand, ple...
simply to level the load/vehicle...a certain make of truck (which will go nameless... those that drive em know it well) could use air bags right from the factory, any load on em and their noses are in the air.